docs: def get_percentile(self, percentile):
          """Get a value representing a the input percentile of the Data Collection.
  
          Args:
              percentile: A float value from 0 to 100 representing the
                  requested percentile.
  
          Return:
              The Data Collection value at the input percentile
          """
          assert 0 <= percentile <= 100, \
              'percentile must be between 0 and 100. Got {}'.format(percentile)
          return self._percentile(self._values, percentile)